Charles Lefevre inoculates trees with fungi that produce truffles.

While the technical craft of Charles Lefevre’s job is complex, the purpose is simple: Encouraging the natural symbiosis between trees and fungi.

In Lefevre’s case, the fungi are of the Tuber genus, which produce highly sought-after truffles and colonize the roots of numerous tree species.

Truffles are known for their culinary desirability and high cost, but the primary role of the fungus is as an extension of the tree’s root system, helping it absorb water and nutrients. In exchange, it’s supplied with starches and sugars for growth.